ESR (RBC sed rate) Quiz
Preview:
Sodium citrated whole blood (blue topped tube). The diluted blood is aspirated into a calibrated ESR column and the cells are allowed to settle for a period of exactly one hour.
A. Westergren method
B. Modified Westergren method
C. Alifax Roller 20-Sysmex
D. all of the above
ESR
Settling dependent on ______
A. protein composition of plasma (fibrinogen)
B. size and shape of erythrocytes
C. erythrocyte concentration
D. all of the above
plays a part in your immune response by interacting with your body’s complement system
A. CRP
C-Reactive Protein Test
B. ESR
Erythrocyte Sedimentation Rate
decreased numbers of RBC’s (anemia)
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
Males, 0-15 mm/hr; >50 yrs. old 0-20 mm/hr
Females, 0-20 mm/hr; >50 yrs. old 0-30 mm/hr
A. Westergren method
B. Modified Westergren method
C. Alifax Roller 20-Sysmex
D. all of the above
polycythemia vera, the RBC count is increased; the blood is more viscous
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
Macrocytes
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
period of fast settling, usually lasts about 40 minutes
A. Lag phase
B. Decantation phase
C. Packing phase
1. Decreased diameter of the tube
2. Using old blood collected longer than 2 hrs
3. Temperature decrease below 20ºC
4. incorrect anticoagulant to blood ratio
5. air bubbles
6.Partially clotted samples (uses up fibrinogen).
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
Serum glycoproteins
Levels increase quickly in response to injury or trauma to tissues and during infections
They are non-specific indicators of inflammation (i.e., cannot diagnose a specific infectious agent or process)
A. Acute Phase Reactants
B. Erythrocyte Sedimentation Rate
C. C-Reactive Protein
D. none
Specimens needs Sodium Citrate tube collection
A. Wintrobe or Modified Westergren
B. true Westergren
allowed to sediment at an angle of 18º and read at the appropriate time, the total analysis time is 20 minutes
A. Westergren method
B. Modified Westergren method
C. Alifax Roller 20-Sysmex
D. all of the above
first 10 minutes, initial period of aggregation, rouleaux is formed
A. Lag phase
B. Decantation phase
C. Packing phase
returns to normal, within a day or so, if the focus of inflammation is eliminated.
A. CRP
C-Reactive Protein Test
B. ESR
Erythrocyte Sedimentation Rate
decrease of the zeta potential
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
When inflammatory process is present, fibrinogen enters the blood in high amounts and causes red cells to stick to each other
A. CRP
C-Reactive Protein Test
B. ESR
Erythrocyte Sedimentation Rate
usually changes more rapidly, because it is made by the liver and secreted hours after the beginning of infection or inflammation
A. CRP
C-Reactive Protein Test
B. ESR
Erythrocyte Sedimentation Rate
Cells with abnormal shapes (poikilocytes such as sickle cells or spherocytes)
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
more sensitive and accurate reflection of the acute phase of inflammation. Increases within hours of inflammation process.
A. Acute Phase Reactants
B. Erythrocyte Sedimentation Rate
C. C-Reactive Protein
D. none
test is specific for a specific disease. i.e. Rheumatoid Arthritis
A. Acute Phase Reactants
B. Erythrocyte Sedimentation Rate
C. C-Reactive Protein
D. none
Increasing levels of plasma proteins (primarily fibrinogen, alpha globulins, or gamma globulins)
A. fall faster,
increasing ESR
B. fall slower,
decreasing ESR
Automated ESR Methods
Roller Principle
A. measures RBC aggregation and extrapolates the sedimentation rate
B. degree of settling of RBCs in plasma in an anticoagulated specimen during a specific time
usually performed in Chemistry or Immunology Dept of Laboratory
A. CRP
C-Reactive Protein Test
B. ESR
Erythrocyte Sedimentation Rate
final period, RBCs crowd closely together, last 10 minutes
A. Lag phase
B. Decantation phase
C. Packing phase
Usually performed in Hematology Department of Laboratory
A. CRP
C-Reactive Protein Test
B. ESR
Erythrocyte Sedimentation Rate
Disclaimer:
Medical Quiz should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. All content on this website is for informational and educational purposes only.